Commit 262137bc authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARCv2: lib: memset: Don't assume 64-bit load/stores 



There are configurations which may not have LDD/STD

Signed-off-by: default avatarClaudiu Zissulescu <claziss@synopsys.com>
Signed-off-by: default avatarAlexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent 21481f2c

arch/arc/lib/memset-archs.S

+36 −7
Original line number Diff line number Diff line
@@ -10,12 +10,6 @@ 


#undef PREALLOC_NOT_AVAIL



#ifdef PREALLOC_NOT_AVAIL

#define PREWRITE(A,B)	prefetchw [(A),(B)]

#else

#define PREWRITE(A,B)	prealloc [(A),(B)]

#endif



ENTRY(memset)

	prefetchw [r0]		; Prefetch the write location

	mov.f	0, r2
@@ -51,9 +45,15 @@ ENTRY(memset) 


;;; Convert len to Dwords, unfold x8

	lsr.f	lp_count, lp_count, 6



	lpnz	@.Lset64bytes

	;; LOOP START

	PREWRITE(r3, 64)	;Prefetch the next write location

#ifdef PREALLOC_NOT_AVAIL

	prefetchw [r3, 64]	;Prefetch the next write location

#else

	prealloc  [r3, 64]

#endif

#ifdef CONFIG_ARC_HAS_LL64

	std.ab	r4, [r3, 8]

	std.ab	r4, [r3, 8]

	std.ab	r4, [r3, 8]
@@ -62,16 +62,45 @@ ENTRY(memset) 
	std.ab	r4, [r3, 8]

	std.ab	r4, [r3, 8]

	std.ab	r4, [r3, 8]

#else

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

#endif

.Lset64bytes:



	lsr.f	lp_count, r2, 5 ;Last remaining  max 124 bytes

	lpnz	.Lset32bytes

	;; LOOP START

	prefetchw   [r3, 32]	;Prefetch the next write location

#ifdef CONFIG_ARC_HAS_LL64

	std.ab	r4, [r3, 8]

	std.ab	r4, [r3, 8]

	std.ab	r4, [r3, 8]

	std.ab	r4, [r3, 8]

#else

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

	st.ab	r4, [r3, 4]

#endif

.Lset32bytes:



	and.f	lp_count, r2, 0x1F ;Last remaining 31 bytes